Sofa



FIG. 1 is a perspective view of a sofa showing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left elevation view thereof;

FIG. 5 is a right elevation view thereof;

FIG. 6 is a top plan view thereof;

FIG. 7 is bottom plan view thereof; and,

FIG. 8 is an exploded view there of.

CLAIM The ornamental design for a sofa, as shown.